Example

3(r+2s)=2t-4
a⋅(b-2)=3b
3(r+2s)=2t-4
a⋅(b-2)=3b

Question

$$\frac{9}{-13}\circ r\frac{7}{-12}$$

Answer

-91*r-3

Solution


Simplify  \(13r\times 7\)  to  \(91r\).
\[9-91r-12\]
Collect like terms.
\[-91r+(9-12)\]
Simplify.
\[-91r-3\]
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